کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8908660 1636676 2018 48 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Late Cenozoic tectonic activity of the Altyn Tagh range: Constraints from sedimentary records from the Western Qaidam Basin, NE Tibetan Plateau
ترجمه فارسی عنوان
فعالیت تکتونیکی در اواخر تنگاتنگی در محدوده آلتین تاخ: محدودیت هایی از پروسه های رسوب شده از حوضه قائدۀ غربی، فلات تی تی ای نپتون
کلمات کلیدی
گزارش های رسوبی، فعالیت تکتونیکی، کانوزوئیک در اواخر، آلتین تاش، حوزه قیدام،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
The Altyn Tagh range (ATR) is the northern geological boundary of the Tibetan Plateau and plays a key role in accommodating its Cenozoic lithospheric deformation. However, knowledge of the structural style and age of uplift of the ATR is limited and controversial. The Qaidam Basin, in the southeast side of the ATR, provides an outstanding field laboratory for understanding the history and mechanisms of ATR growth. This study presents a detailed sedimentological analysis of a 1040-m-thick late Cenozoic (~17-5.0 Ma) sedimentary sequence from the western Qaidam Basin, together with the analysis of sedimentological data from nearby boreholes and sections. Our aims were to determine the spatiotemporal evolution of the sedimentary sequences in the study area and to explore their response to late Cenozoic tectonic activity in the ATR. The results show three major intervals of the sedimentary characteristics in the study area: ~>17-16 Ma, 10 Ma and <5 Ma, which are closely related to the development of unconformities and growth strata recorded by high-resolution seismic reflection profiles. Combining the results with a comprehensive provenance analysis and with published records of regional climate change and tectonic activity, we discuss the possible factors responsible for the variations in the sedimentary characteristics of the studied sections. We conclude that significant tectonic responses in the western Qaidam Basin during the late Cenozoic were caused by three stages of tectonic activity of the ATR, at ~>17-16 Ma, ~16-10 Ma and ~10 Ma, during which the ATR respectively experienced tectonic uplift, fast strike-slip motion and intense uplift.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 737, 10 July 2018, Pages 40-56
نویسندگان
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